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CocoaRestClientYaak
Free

Free and open source.

 Freemium

Yaak is MIT licensed and free to build and use. Development is funded by…

macOS Windows, macOS, Linux
  • Native Cocoa app with low memory use
  • Pretty prints JSON and XML responses
  • Requests are stored as files on your machine, so a git repository is the shared collection
  • REST, GraphQL, gRPC, WebSocket and Server-Sent Events in one client
  • macOS only
  • Fewer collaboration and scripting features than larger API platforms
  • A much younger project than Postman, with a smaller community
  • No hosted collaboration features if that is what you actually want
Downloadable app Downloadable app
Open source Open source
License not stated License: MIT
No account needed No account needed
Not stated if it works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.